Resumo

JUAREZ-HERNANDEZ, Luis G.; TAPIA-GARCIA, Margarito  e  LUNA-MONSIVAIS, Brian. Structure of fish communities in Maguey and Cacaluta bays, Huatulco, Oaxaca. Rev. Mex. Biodiv. [online]. 2013, vol.84, n.4, pp.1243-1257. ISSN 2007-8706.  https://doi.org/10.7550/rmb.28910.

This study describes the composition and structure of the fish communities in Maguey and Cacaluta Bays. Ichthyofauna was characterized using transect visual census in February, April and July of 2004. A census was taken in both localities of2 874 individuals belonging to 42 species. Pomacentridae and Labridae were the families that were most represented. Thalassoma lucasanum, Chromis atrilobata, Stegastes acapulcoensis and Microspathodon dorsalis were the dominant species. Composition, species richness, abundance, diversity and dominance presented notable spatial differentiation, making it possible to distinguish 3 ictic components in each locality: sandy, rocky and coralline. The coralline component registered the greatest species richness, abundance and diversity due to the high structural complexity of its environment. The sandy component presented the greatest dominance. The dry seasons presented the greatest abundance, primarily determined by the increase in the abundance of C. atrilobata and T. lucasanum. The greatest species richness and diversity was present during rainy seasons, likely due to high temperatures and high production associated with regional coastal processes.

Palavras-chave : Huatulco National Park; ichthyofauna; visual census; diversity; ictic components; Chromis atrilobata.

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